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Codeforces Round 950 (Div. 3)
38:15:58
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Difficulty:
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data structures
combine-tags-by-or
*combine tags by OR
2-sat
binary search
bitmasks
brute force
chinese remainder theorem
combinatorics
constructive algorithms
data structures
dfs and similar
divide and conquer
dp
dsu
expression parsing
fft
flows
games
geometry
graph matchings
graphs
greedy
hashing
implementation
interactive
math
matrices
meet-in-the-middle
number theory
probabilities
schedules
shortest paths
sortings
string suffix structures
strings
ternary search
trees
two pointers
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Problems
#
Name
1896D
Ones and Twos
binary search
,
data structures
,
divide and conquer
,
math
,
two pointers
1700
x5278
1895G
Two Characters, Two Colors
binary search
,
data structures
,
dp
,
flows
,
greedy
3100
x178
1895E
Infinite Card Game
binary search
,
brute force
,
data structures
,
dfs and similar
,
dp
,
dsu
,
games
,
graphs
,
greedy
,
sortings
,
two pointers
2300
x1470
1895D
XOR Construction
bitmasks
,
constructive algorithms
,
data structures
,
math
,
string suffix structures
,
trees
1900
x5635
1893D
Colorful Constructive
constructive algorithms
,
data structures
,
greedy
2600
x829
1891F
A Growing Tree
data structures
,
dfs and similar
,
trees
2000
x3427
1889F
Doremy's Average Tree
data structures
,
dp
,
greedy
,
trees
3500
x69
1889C2
Doremy's Drying Plan (Hard Version)
data structures
,
dp
2600
x898
1889C1
Doremy's Drying Plan (Easy Version)
brute force
,
data structures
,
dp
,
greedy
,
sortings
2000
x3050
1887D
Split
binary search
,
data structures
,
divide and conquer
,
dsu
,
math
,
trees
,
two pointers
2700
x827
1887C
Minimum Array
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
hashing
,
two pointers
2400
x1598
1886F
Diamond Theft
data structures
,
greedy
3300
x161
1886D
Monocarp and the Set
combinatorics
,
data structures
,
math
2100
x3364
1884C
Medium Design
brute force
,
data structures
,
dp
,
greedy
,
sortings
1700
x5552
1883F
You Are So Beautiful
data structures
1400
x8376
1883D
In Love
data structures
,
greedy
1500
x10187
1881G
Anya and the Mysterious String
binary search
,
data structures
2000
x2203
1879F
Last Man Standing
brute force
,
data structures
,
number theory
2800
x475
1878G
wxhtzdy ORO Tree
binary search
,
bitmasks
,
brute force
,
data structures
,
dfs and similar
,
implementation
,
trees
2300
x1105
1878E
Iva & Pav
binary search
,
bitmasks
,
data structures
,
greedy
1400
x11347
1878D
Reverse Madness
data structures
,
greedy
1600
x7687
1876G
Clubstep
binary search
,
brute force
,
data structures
,
greedy
,
trees
3500
x118
1876E
Ball-Stackable
constructive algorithms
,
data structures
,
dp
,
trees
3300
x256
1872E
Data Structures Fan
binary search
,
bitmasks
,
data structures
,
dp
1500
x12244
1870H
Standard Graph Problem
data structures
,
graphs
,
greedy
,
trees
3500
x78
1870G
MEXanization
data structures
3300
x203
1870C
Colorful Table
binary search
,
data structures
,
dp
,
implementation
,
math
,
two pointers
1300
x10873
1868F
LIS?
data structures
,
greedy
,
implementation
3500
x70
1867C
Salyg1n and the MEX Game
constructive algorithms
,
data structures
,
games
,
greedy
,
interactive
1300
x10675
1866K
Keen Tree Calculation
binary search
,
data structures
,
dp
,
geometry
,
graphs
,
implementation
,
trees
2500
x415
1866G
Grouped Carriages
binary search
,
data structures
,
dp
,
flows
,
greedy
2100
x1535
1866F
Freak Joker Process
binary search
,
data structures
,
sortings
3100
x122
1864F
Exotic Queries
data structures
,
implementation
,
sortings
2300
x1323
1864E
Guess Game
bitmasks
,
data structures
,
games
,
math
,
probabilities
,
sortings
,
strings
,
trees
2100
x2481
1864D
Matrix Cascade
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
math
1700
x6406
1862G
The Great Equalizer
binary search
,
data structures
,
math
,
sortings
2000
x2691
1862E
Kolya and Movie Theatre
constructive algorithms
,
data structures
,
greedy
1600
x9755
1862C
Flower City Fence
binary search
,
data structures
,
implementation
,
sortings
1100
x19840
1861C
Queries for the Array
data structures
,
dfs and similar
,
implementation
,
strings
,
trees
1600
x9575
1860F
Evaluate RBS
data structures
,
geometry
,
implementation
,
math
,
sortings
2900
x266
1860E
Fast Travel Text Editor
data structures
,
dfs and similar
,
graphs
,
shortest paths
2400
x1320
1860C
Game on Permutation
data structures
,
dp
,
games
,
greedy
1400
x12563
1859F
Teleportation in Byteland
data structures
,
dfs and similar
,
divide and conquer
,
graphs
,
shortest paths
,
trees
3200
x373
1859D
Andrey and Escape from Capygrad
binary search
,
data structures
,
dp
,
dsu
,
greedy
,
sortings
1800
x6607
1858E2
Rollbacks (Hard Version)
data structures
,
interactive
,
trees
2600
x1014
1858E1
Rollbacks (Easy Version)
brute force
,
data structures
,
dfs and similar
,
trees
2500
x1255
1858D
Trees and Segments
brute force
,
data structures
,
dp
,
greedy
,
two pointers
2200
x2719
1857F
Sum and Product
binary search
,
data structures
,
math
1600
x10546
1856C
To Become Max
binary search
,
brute force
,
data structures
,
dp
1600
x11227
1852F
Panda Meetups
data structures
,
dp
,
flows
3500
x100
1852E
Rivalries
constructive algorithms
,
data structures
,
greedy
3400
x159
1852C
Ina of the Mountain
data structures
,
dp
,
greedy
,
math
2400
x1471
1851G
Vlad and the Mountains
binary search
,
data structures
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
,
two pointers
2000
x2971
1850G
The Morning Star
combinatorics
,
data structures
,
geometry
,
implementation
,
math
,
sortings
1500
x11399
1849F
XOR Partition
binary search
,
bitmasks
,
data structures
,
divide and conquer
,
greedy
,
trees
2700
x666
1849E
Max to the Right of Min
binary search
,
data structures
,
divide and conquer
,
dp
,
dsu
,
two pointers
2300
x1533
1849C
Binary String Copying
binary search
,
brute force
,
data structures
,
hashing
,
strings
1600
x9939
1848B
Vika and the Bridge
binary search
,
data structures
,
greedy
,
implementation
,
math
,
sortings
1200
x13600
1847F
The Boss's Identity
binary search
,
bitmasks
,
data structures
,
dfs and similar
,
greedy
,
math
,
sortings
2500
x861
1847D
Professor Higashikata
data structures
,
dsu
,
greedy
,
implementation
,
strings
1900
x3622
1846C
Rudolf and the Another Competition
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1200
x18090
1845D
Rating System
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
math
,
two pointers
1800
x7394
1844H
Multiple of Three Cycles
combinatorics
,
data structures
,
dp
,
dsu
,
math
3400
x133
1844G
Tree Weights
bitmasks
,
constructive algorithms
,
data structures
,
dfs and similar
,
implementation
,
math
,
matrices
,
number theory
,
trees
3000
x654
1844F2
Min Cost Permutation (Hard Version)
binary search
,
constructive algorithms
,
data structures
,
greedy
,
math
,
sortings
2800
x371
1843F2
Omsk Metro (hard version)
data structures
,
dfs and similar
,
divide and conquer
,
dp
,
math
,
trees
2300
x1488
1843F1
Omsk Metro (simple version)
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
trees
1800
x5030
1843E
Tracking Segments
binary search
,
brute force
,
data structures
,
two pointers
1600
x11219
1842E
Tenzing and Triangle
data structures
,
dp
,
geometry
,
greedy
,
math
2300
x1550
1841E
Fill the Matrix
data structures
,
greedy
,
math
2200
x1903
1841D
Pairs of Segments
data structures
,
greedy
,
sortings
,
two pointers
2000
x4177
1840E
Character Blocking
data structures
,
hashing
,
implementation
1600
x7614
1839D
Ball Sorting
data structures
,
dp
,
sortings
2100
x2194
1838D
Bracket Walk
data structures
,
greedy
,
strings
2100
x3099
1837F
Editorial for Two
binary search
,
data structures
,
greedy
,
implementation
2400
x2089
1834E
MEX of LCM
binary search
,
data structures
,
implementation
,
math
,
number theory
2300
x2087
1834D
Survey in Class
brute force
,
data structures
,
greedy
,
implementation
,
sortings
1900
x4385
1833F
Ira and Flamenco
combinatorics
,
constructive algorithms
,
data structures
,
implementation
,
math
,
sortings
,
two pointers
1700
x6822
1830F
The Third Grace
data structures
,
dp
3200
x227
1830E
Bully Sort
data structures
,
math
3500
x232
1829G
Hits Different
data structures
,
dp
,
implementation
,
math
1600
x9547
1827F
Copium Permutation
constructive algorithms
,
data structures
,
greedy
3500
x111
1827D
Two Centroids
data structures
,
dfs and similar
,
greedy
,
trees
2800
x712
1827C
Palindrome Partition
binary search
,
brute force
,
data structures
,
dp
,
hashing
,
strings
2600
x1156
1827B2
Range Sorting (Hard Version)
binary search
,
data structures
,
dp
,
greedy
2400
x1784
1826E
Walk the Runway
bitmasks
,
brute force
,
data structures
,
dp
,
graphs
,
implementation
,
sortings
2400
x1517
1824E
LuoTianyi and Cartridge
data structures
,
trees
3500
x127
1824D
LuoTianyi and the Function
data structures
3000
x462
1824C
LuoTianyi and XOR-Tree
data structures
,
dfs and similar
,
dp
,
dsu
,
greedy
,
trees
2500
x1267
1822G2
Magic Triples (Hard Version)
brute force
,
data structures
,
math
,
number theory
2200
x2331
1822G1
Magic Triples (Easy Version)
brute force
,
data structures
,
math
,
number theory
1700
x6581
1819F
Willy-nilly, Crack, Into Release!
data structures
,
dp
3500
x128
1819D
Misha and Apples
brute force
,
data structures
,
dp
,
two pointers
2800
x601
1817A
Almost Increasing Subsequence
binary search
,
data structures
,
greedy
1500
x10433
1814E
Chain Chips
data structures
,
dp
,
matrices
2300
x1267
1814D
Balancing Weapons
binary search
,
brute force
,
data structures
,
math
,
two pointers
2500
x828
1811G2
Vlad and the Nice Paths (hard version)
binary search
,
combinatorics
,
data structures
,
dp
,
math
,
two pointers
2200
x1642
1810F
M-tree
data structures
,
math
,
sortings
,
trees
2800
x547
1810E
Monsters
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
2100
x2996
1809F
Traveling in Berland
binary search
,
data structures
,
graphs
,
greedy
,
implementation
2500
x713
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